On Mon, 2009-08-17 at 08:15 +0800, Rafael J. Wysocki wrote:> On Wednesday 12 August 2009, Rafael J. Wysocki wrote:> > Hi,> > > > The following patches introduce a mechanism allowing us to execute device> > drivers' suspend and resume callbacks asynchronously during system sleep> > transitions, such as suspend to RAM. The idea is explained in the [1/1] patch> > message.> > Changes:> > * Added [1/7] that fixes kerneldoc comments in drivers/base/power/main.c> (this is a 2.6.32 candidate).> > * Added [2/7] adding a framework for representing PM link (idea described> in the patch message).> > * [3/7] is the async resume patch (idea described in the patch message).> > * [4/7] is the async suspend patch.> > * [5/7] - [7/7] set async_suspend for devices in a few selected subsystems.> > The patches have been tested on HP nx6325.> I tried this patch set and it does work. :)But unfortunately it doesn't save too much time.

I still think that the child device should inherit its parent'sasync_suspend flag to do the asynchronous resume more efficiently.

or at least we should provide such an interfacein ﻿drivers/base/power/common.c, so that device can tell the device coreto inherit this flag if there is no off-tree dependency.